Function as objects

Question

def add(x, y):
return x + y

def do_twice(func, x, y):
return func(func(x, y), func(x, y))

a = 5
b = 10

print(do_twice(add, a, b))
please explain deeply because these type of concept is new for me

Answer 1

do_twice(add,5,10)
return add(add(5,10),add(5,10)
return add(15,15)
return 30
#outputs 30

Answer 2

def add(x,y):
return a+b

def do_twice(func,x, y):
return func(func(x,y),func(x,y))
👆. 👆. 👆
add. add. add
print(do_twice(add,5, 3))
👆. 👆 👆
func. x. y
where fun is add ,x=5, y=3,now you can think how this do_twice function works.

Answer 3

Thank you every one i understand